1. Product Overview

The STD700 series, as a member of the SmartLine product family, is a high - performance differential pressure transmitter that leverages advanced sensor technology. Engineered to meet the stringent demands of industrial applications, it provides reliable and accurate differential pressure measurement, playing a crucial role in ensuring the smooth operation of various industrial processes.

2. Product Data

2.1 Measurement Range

The STD700 series offers a wide measurement range. For example, the STD720 has a range from - 100 to 100 with a minimum range of 1, the STD730 ranges from - 700 to 700 with a minimum range of 7, and the STD770 covers from - 700 to 21000 with a minimum range of 210. This wide - ranging capability allows it to be applied in diverse industrial scenarios, from low - differential pressure applications to those requiring high - precision measurement of large pressure differences.

2.2 Accuracy

It achieves an impressive accuracy of 0.065% of the calibrated range. Such high precision is vital in industrial processes where even small errors in differential pressure measurement can lead to significant inefficiencies, product quality issues, or safety risks.

2.3 Stability

With a stability of 0.025% of the full scale maintained over 5 years, the STD700 series ensures consistent and reliable performance over an extended period. This long - term stability reduces the frequency of calibration and maintenance, resulting in lower operational costs.

2.4 Response Time

The series features a rapid response time of up to 100 ms. This quick response enables it to promptly detect changes in differential pressure, allowing for immediate adjustments in industrial processes, thus preventing potential process disruptions.

2.5 Power Supply

It operates on a common industrial power supply, with flexibility in power input. The power consumption is designed to be energy - efficient, contributing to overall cost - effective operation.

2.6 Output Signal

The STD700 series provides multiple output signal options, including 4 - 20 mA dc, Honeywell Digital Enhanced (DE), HART® (Version 7.0), and FOUNDATION™ Fieldbus. These standard output signals make it easy to integrate with various control systems, ensuring seamless data transfer and communication within industrial automation setups.

3. Product Features

3.1 Advanced Sensor Technology

Equipped with a high - performance piezoresistive sensor, the STD700 series combines pressure sensing with on - chip temperature compensation. This advanced technology enables it to provide highly accurate measurements across a wide range of application pressures and temperatures, ensuring reliable performance even in challenging environments.

3.2 Robust Construction

Built with a focus on durability, the STD700 series has a rugged housing that can withstand harsh industrial conditions. It offers excellent resistance to mechanical stress, vibration, and corrosion, making it suitable for use in demanding industrial settings such as chemical plants, oil refineries, and manufacturing facilities.

3.3 Digital Communication Capability

In addition to the analog output, the series supports digital communication protocols like HART, DE, and FOUNDATION Fieldbus. This digital communication feature allows for remote configuration, calibration, and diagnostic functions. Maintenance personnel can monitor and manage the device remotely, reducing the need for on - site physical access, which significantly improves operational efficiency and minimizes downtime.

3.4 Automatic Compensation

The STD700 series features automatic static pressure and temperature compensation. This ensures that the measured differential pressure values remain accurate regardless of fluctuations in static pressure or ambient temperature, providing stable and reliable measurement data in dynamic industrial environments.

3.5 High Over - Pressure Protection

It is designed with top - notch over - pressure protection mechanisms. Based on an integrated double - seal design compliant with ANSI/NFPA 70 - 202 and ANSI/ISA 12.27.0 standards, it can withstand high over - pressures, ensuring the safety and integrity of the device during operation.

4. Applications

4.1 Chemical Industry

In the chemical industry, the STD700 series is widely used in processes such as distillation, filtration, and reactor monitoring. For example, in a distillation column, accurate differential pressure measurement helps control the separation process, ensuring the quality of chemical products. In filtration systems, it monitors the pressure difference across filters to indicate when filter replacement is required, preventing process interruptions.

4.2 Oil and Gas Industry

In oil refineries and gas processing plants, the STD700 series plays a crucial role. It is used to measure the differential pressure in pipelines to detect blockages or leaks. In oil - well monitoring, it helps in assessing the flow rate and pressure conditions, optimizing production efficiency and ensuring safe operation.

4.3 Power Generation

In power plants, whether thermal, nuclear, or renewable, the STD700 series is applied in various areas. In a thermal power plant's boiler, it measures the differential pressure in air - flow systems to control combustion efficiency. In a wind turbine, it monitors the pressure difference across the blades to optimize power generation and protect the equipment from damage due to abnormal pressure changes.

4.4 Food and Beverage Industry

In food and beverage manufacturing, accurate differential pressure control is essential for maintaining product quality and safety. The STD700 series is used in processes like pasteurization, where it ensures proper pressure differentials to achieve effective heat treatment while preserving the product's taste and nutritional value. It is also used in filling operations to control the flow rate and pressure of liquids, ensuring accurate filling levels.